implemented provisioning routine

app/src/main/java/org/fdroid/fdroid/Provisioner.java

@@ -3,12 +3,14 @@ package org.fdroid.fdroid;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
-import android.os.Environment;
 import android.util.Base64;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import org.apache.commons.io.IOUtils;
+import org.fdroid.fdroid.data.Repo;
+import org.fdroid.fdroid.data.RepoProvider;
+import org.fdroid.fdroid.views.ManageReposActivity;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -26,11 +28,18 @@ import java.util.zip.ZipInputStream;
 /**
  * @author Michael Pöhn (michael.poehn@fsfe.org)
  */
+@SuppressWarnings("LineLength")
 public class Provisioner {
 
     public static final String TAG = "Provisioner";
 
-    private static final String DEFAULT_PROVISION_DIR = Environment.getExternalStorageDirectory().getPath();
+    /**
+     * This is the name of the subfolder in the file directory of this app
+     * where {@link Provisioner} looks for new provisions.
+     *
+     * eg. in the Emulator (API level 24): /data/user/0/org.fdroid.fdroid.debug/files/provisions
+     */
+    private static final String NEW_PROVISIONS_DIR = "provisions";
 
     protected Provisioner() {
     }
@@ -38,39 +47,74 @@ public class Provisioner {
     /**
      * search for provision files and process them
      */
-    public void scanAndProcess(Context context) {
+    public static void scanAndProcess(Context context) {
 
-        List<File> files = findProvisionFiles();
+        File provisionDir = new File(context.getExternalFilesDir(null).getAbsolutePath() + File.separator + NEW_PROVISIONS_DIR);
-        List<ProvisionPlaintext> plaintexts = extractProvisionsPlaintext(files);
-        files.clear();
 
-        List<Provision> provisions = parseProvisions(plaintexts);
+        if (!provisionDir.isDirectory()) {
-        plaintexts.clear();
+            Utils.debugLog(TAG, "Provisions dir does not exists: '" + provisionDir.getAbsolutePath() + "' moving on ...");
+        } else if (provisionDir.list().length == 0) {
+            Utils.debugLog(TAG, "Provisions dir is empty: '" + provisionDir.getAbsolutePath() + "' moving on ...");
+        } else {
 
-        // TODO: do something useful with provisions, like prompting users
+            Provisioner p = new Provisioner();
+            List<File> files = p.findProvisionFiles(context);
+            List<ProvisionPlaintext> plaintexts = p.extractProvisionsPlaintext(files);
+            List<Provision> provisions = p.parseProvisions(plaintexts);
+
+            if (provisions == null || provisions.size() == 0) {
+                Utils.debugLog(TAG, "Provision dir does not contain any provisions: '" + provisionDir.getAbsolutePath() + "' moving on ...");
+            } else {
+                int cleanupCounter = 0;
                 for (Provision provision : provisions) {
                     if (provision.getRepositoryProvision() != null) {
                         RepositoryProvision repo = provision.getRepositoryProvision();
-                Utils.debugLog(TAG, "repository:"
-                        + " " + repo.getName()
-                        + " " + repo.getUrl()
-                        + " " + repo.getUsername());
 
-                Intent i  = new Intent(Intent.ACTION_VIEW);
+                        // TODO uniqx: check if repo is already enable
-                i.setData(Uri.parse(repo.getUrl()));
+                        Repo storedRepo = RepoProvider.Helper.findByAddress(context, repo.getUrl());
+                        if (storedRepo != null) {
+                            Utils.debugLog(TAG, "Provision contains a repo which is already added: '" + provision.getProvisonPath() + "' ignoring ...");
+                        } else {
+                            // Note: only the last started activity will visible to users.
+                            // All other prompting attempts will be lost.
+                            Uri origUrl = Uri.parse(repo.getUrl());
+                            Uri.Builder data = new Uri.Builder();
+                            data.scheme(origUrl.getScheme());
+                            data.encodedAuthority(Uri.encode(repo.getUsername()) + ":" + Uri.encode(repo.getPassword()) + "@" + Uri.encode(origUrl.getAuthority()));
+                            data.path(origUrl.getPath());
+                            data.appendQueryParameter("fingerprint", repo.getSigfp());
+                            Intent i = new Intent(context, ManageReposActivity.class);
+                            i.setData(data.build());
                             context.startActivity(i);
+                            Utils.debugLog(TAG, "Provision processed: '" + provision.getProvisonPath() + "' prompted user ...");
+                        }
+
+                    }
+
+                    // remove provision file
+                    try {
+                        new File(provision.getProvisonPath()).delete();
+                        cleanupCounter++;
+                    } catch (SecurityException e) {
+                        // ignore this exception
+                        Utils.debugLog(TAG, "Removing provision not possible: " + e.getMessage() + " ()");
+                    }
+                }
+                Utils.debugLog(TAG, "Provisions done, removed " + cleanupCounter + " provision(s).");
             }
         }
     }
 
-    /**
+    public List<File> findProvisionFiles(Context context) {
-     * @return List of
+        String provisionDirPath = context.getExternalFilesDir(null).getAbsolutePath() + File.separator + NEW_PROVISIONS_DIR;
-     */
+        return findProvisionFilesInDir(new File(provisionDirPath));
-    public List<File> findProvisionFiles() {
-        return findProvisionFilesInDir(new File(DEFAULT_PROVISION_DIR));
     }
 
     protected List<File> findProvisionFilesInDir(File file) {
+        if (file == null || !file.isDirectory()) {
+            return new ArrayList<>();
+        }
+        try {
             File[] files = file.listFiles(new FilenameFilter() {
                 @Override
                 public boolean accept(File dir, String name) {
@@ -81,6 +125,10 @@ public class Provisioner {
                 }
             });
             return files != null ? Arrays.asList(files) : null;
+        } catch (Exception e) {
+            Utils.debugLog(TAG, "can not search for provisions, can not access: " + file.getAbsolutePath(), e);
+            return new ArrayList<>();
+        }
     }
 
     String rot13(String text) {
@@ -109,6 +157,7 @@ public class Provisioner {
 
     protected List<ProvisionPlaintext> extractProvisionsPlaintext(List<File> files) {
         List<ProvisionPlaintext> result = new ArrayList<>();
+        if (files != null) {
             for (File file : files) {
                 ProvisionPlaintext plain = new ProvisionPlaintext();
                 plain.setProvisionPath(file.getAbsolutePath());
@@ -142,6 +191,7 @@ public class Provisioner {
 
                 result.add(plain);
             }
+        }
         return result;
     }
 
@@ -150,16 +200,18 @@ public class Provisioner {
         List<Provision> provisions = new ArrayList<>();
         ObjectMapper mapper = new ObjectMapper();
 
+        if (provisionPlaintexts != null) {
             for (ProvisionPlaintext provisionPlaintext : provisionPlaintexts) {
                 Provision provision = new Provision();
                 provision.setProvisonPath(provisionPlaintext.getProvisionPath());
                 try {
                     provision.setRepositoryProvision(
                             mapper.readValue(provisionPlaintext.getRepositoryProvision(), RepositoryProvision.class));
+                    provisions.add(provision);
                 } catch (IOException e) {
                     Utils.debugLog(TAG, "could not parse repository provision", e);
                 }
-            provisions.add(provision);
+            }
         }
 
         return provisions;